Passing in the wrong format file should generate a proper error message instead of a python stack trace. Please enter a Tianocore Bugzilla with the details from your logs. https://bugzilla.tianocore.org/ Thanks, Mike From: np l Sent: Sunday, July 31, 2022 9:04 AM To: S, Ashraf Ali Cc: devel@edk2.groups.io; Kinney, Michael D Subject: Re: [edk2-devel] EDK2 build error:Unknown fatal error when processing [] OK! Thanks a lot, It's great to receive your reply! So it's just a small but serious problem😂 Sorry to bother you! Thanks again!!! S, Ashraf Ali > 于2022年7月31日周日 22:45写道: Hi -p PLATFORMFILE, --platform=PLATFORMFILE Build the platform specified by the DSC file name argument, overriding target.txt's ACTIVE_PLATFORM definition. -a TARGETARCH, --arch=TARGETARCH ARCHS is one of list: IA32, X64, ARM, AARCH64, RISCV64 or EBC, which overrides target.txt's TARGET_ARCH definition. To specify more archs, please repeat this option. Regards, Ashraf Ali S Intel Technology India Pvt. Ltd. From: devel@edk2.groups.io > On Behalf Of Michael D Kinney Sent: Sunday, July 31, 2022 8:53 AM To: devel@edk2.groups.io; lnpabcde@gmail.com; Kinney, Michael D > Subject: Re: [edk2-devel] EDK2 build error:Unknown fatal error when processing [] You should pass in .dsc file, not .dec file for -p option of build. Mike From: devel@edk2.groups.io > On Behalf Of np l Sent: Saturday, July 30, 2022 7:02 PM To: devel@edk2.groups.io Subject: [edk2-devel] EDK2 build error:Unknown fatal error when processing [] Hi, I got a fatal error with a command "build -p edk2\MdeModulePkg\MdeModulePkg.dec -a X64 -t VS2015x86". (Python version is 2.7.15.Build tool is VS2015x86) But UEFI\edk2\EmulatorPkg\EmulatorPkg.dec can be build successfully. I have update edk2 with "git pull" but the same error occured. I also test it in another laptop with python version 3.9.9 build tool VS2019,a same error occur. What should I do? error log as blow: [cid:image001.png@01D8A4BF.664275D0] Thanks!